US3393541A - Magnetically actuated tumbler lock - Google Patents

Magnetically actuated tumbler lock Download PDF

Info

Publication number
US3393541A
US3393541A US62709267A US3393541A US 3393541 A US3393541 A US 3393541A US 62709267 A US62709267 A US 62709267A US 3393541 A US3393541 A US 3393541A
Authority
US
United States
Prior art keywords
lock
key
magnet pieces
permanent magnet
pins
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Other languages
English (en)
Inventor
Wake Kiyoyasu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuji Manufacturing Co Ltd
Original Assignee
Fuji Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Manufacturing Co Ltd filed Critical Fuji Manufacturing Co Ltd
Application granted granted Critical
Publication of US3393541A publication Critical patent/US3393541A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B47/0038—Operating or controlling locks or other fastening devices by electric or magnetic means using permanent magnets
    • E05B47/0044—Cylinder locks with magnetic tumblers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/70—Operating mechanism
    • Y10T70/7051—Using a powered device [e.g., motor]
    • Y10T70/7057—Permanent magnet

Definitions

  • ABSTRACT OF THE DISCLOSURE The combination of a lock and a key wherein at least one permanent magnet piece is provided in the key and, also, at least one permanent magnet piece is provided in the lock which is adapted to cooperate with the magnet piece in the key so as to be moved to unlock the lock by the permanent magnet piece in the key only when the proper key is inserted properly in the lock by the action of attraction or repulsion force acting between the magnet pieces in the lock and the key depending upon the orientation of the polarity of the permanent magnet pieces.
  • each magnetic piece can be secured within a tubular shell.
  • the present invention relates to improvement in a lock and a key, and more particularly to improvement in a magnet tumbler lock and a key therefor in which a plurality of permanent magnet pieces are movably provided in the lock which permanent magnet pieces are attracted or repelled by the corresponding permanent magnet pieces provided in the key when it is inserted into said lock so as to move said first mentioned permanent magnet pieces in the lock out of their normal locking positions so that the lock is unlocked.
  • Prior art locks and keys therefor are elaborately made in the forms of so-called cylinder locks including pintumbler locks, disc-tumbler locks and lever-tumbler locks which can be unlocked only under the condition that several of the pins, discs or levers built in the locks are moved to specific positions so as to permit the lock to be operated depending upon the height of notches in the edge of each of the keys specifically designed to be used with the specific locks, respectively, to unlock them by inserting the keys in the locks.
  • a plurality of key changes keys having difierent unlocking characteristics
  • a master key which has the unlocking characteristics corresponding to those of a predetermined number of key can unlock a group of locks to be used with said predetermined number of keys, respectively.
  • magnet tumbler locks have been developed wherein the pins of pin-tumbler locks are made of magnetizable metal and the keys to be used therewith are provided with a plurality of permanent magnet pieces embedded therein at positions corresponding to the pins, respectively, instead of providing notches in the edge of each of the keys serving as unlocking means.
  • said permanent magnet pieces in the keys being adapted to attract said magnetizable pins in the locks, respectively, when the keys are inserted into the locks thereby moving the pins to unlocking positions so that the locks are unlocked by turning the keys.
  • the above disadvantages are overcome by the present invention by providing at least one permanent magnet piece in the key which is adapted to cooperate with at least one permanent magnet piece provided in the lock only when the proper key is inserted in the lock so that the permanent magnet piece in the lock is moved to its unlocking position by the action of the atraction or repulsion force acting between the permanent magnet pieces of the lock and the key if the orientation of the polarity of the permanent magnet piece is appropriately selected.
  • a protective shell is provided by the present invention to protect the movable magnetic pieces.
  • the magnet tumbler lock in accordance with the invention overcomes the defects inherent in the prior art tumbler lock.
  • An object of the present invention is, therefore, to provide a tumbler lock which avoids the above-mentioned disadvantages of the prior art locks.
  • Another object of the present invention is to provide a magnet tumbler lock acting like the prior art mechanical pin-tumbler lock, disc-tumbler lock and lever-tumbler lock, said magnet tumbler utilizing not only magnetic attraction force but also repulsion force acting between the permanent magnet pieces provided both in the lock and the key to be used therewith when the key is inserted in the lock so as to move the magnet pieces in the lock to proper unlocking positions only when the proper key specifically designed to be used with said lock is inserted into the look.
  • a further object of the present invention is to provide a tumbler lock in which the above-mentioned magnet lock construction is utilized in combination with the conventional pin-tumbler, disc-tumbler or lever-tumbler construction so that the number of key change (difierent unlocking characteristics) may be greatly increased.
  • a still further object of the present invention is to enhance the mechanical strength of permanent magnet pieces.
  • FIG. 1 shows a longitudinal sectional view of the first embodiment of the magnet lock in accordance with the present invention
  • FIG. 2 shows a cross sectional view taken in the plane perpendicular to that of FIG. 1,
  • FIG. 3 shows a longitudinal sectional view similar to FIG. 1 but showing the lock in unlocking position by inserting the key to be properly used with the lock
  • FIG. 4 shows a cross sectional view similar to FIG. 2 but showing the lock in unlocked state by inserting the key into the lock
  • FIG. 5A is a diagrammatic view showing how the pins of the lock in accordance with the present invention are actuated to assume their unlocked positions by the proper key to be used with the lock,
  • FIG. 5B is also a diagrammatic view similar to FIG. 5A but showing how the pins are actuated by the improper key preventing the lock from being actuated to assume the unlocked position,
  • FIG. 6 shows a side view, partly in cross section, of a second embodiment of the magnet tumbler lock in accordance with the present invention in which the mechanism of the conventional pin-tumbler lock is used in combination with the magnetically actuated pins in accordance with the present invention
  • FIG. 7 shows a side view, partly in cross section, of the third embodiment of the present invention in which the mechanism of the conventional disc-tumbler lock is built in together with the pins magnetically actuated in accordance with the present invention
  • FIG. 8 is a cross sectional view taken in the plane perpendicular to that of FIG. 7,
  • FIG. 9 shows a side view, partly in cross section, of the fourth embodiment of the present invention in which the mechanism of the conventional levertumbler lock is incorporated with the magnetically actuated pins in accordance with the present invention
  • FIG. 10 shows a longitudinal section of the fifth embodiment of the magnet tumbler lock in accordance with the present invention in which permanent magnet pieces are built in for repelling the pins toward the locking position when the key is not inserted into the lock,
  • FIG. 11 is a cross sectional view taken in the plane perpendicular to that of FIG. 10,
  • FIG. 12 shows a longitudinal section similar to FIG. 10 but showing the lock in unlocked position by inserting the key properly designed to be used with the lock into the lock,
  • FIG. 13 is a cross sectional view taken in the plane perpendicular to that of FIG. 12,
  • FIG. 14 shows a longitudinal sectional view similar to FIG. 10 but showing the lock with an improper key being inserted into the lock so that some of the magnetically actuatable pins cannot be moved to unlocking position thereby preventing the lock from being released,
  • FIG. 15 is a cross sectional view taken in the plane perpendicular to that of FIG. 14,
  • FIG. 16 is a plan view of FIG. 14,
  • FIG. 17 is an elevational view of the sixth embodiment of the magnet tumbler lock in accordance with the present invention.
  • FIG. 18 is a cross sectional view taken in the plane perpendicular to that of FIG. 17,
  • FIG. 19 is a horizontal longitudinal sectional view taken in the plane perpendicular to that of FIG. 17,
  • FIG. 20A is a longitudinal sectional view of the pin with the permanent magnet piece built therein in accordance with the present invention.
  • FIG. 20B is a cross sectional view taken in the plane perpendicular to that of FIG. 20A,
  • FIG. 21 shows a longitudinal sectional view of the seventh embodiment of the magnet tumbler lock in accordance with the present invention wherein the magnetically actuated pins in the lock are moved by magnetic attraction toward unlocking positions by inserting the key properly designed to be used with the lock,
  • FIG. 22 is a modification of the lock shown in FIG. 21 wherein pins in the lock are normally held in locking positions by the attracting forces effected by attracting magnet pieces provided in the lock,
  • FIG. 23 is a cross sectional view taken in the plane of FIG. 22,
  • FIG. 24A shows a side view, partly in section, of a key to be used with further embodiment of the magnet tumbler lock of the present invention, 4
  • FIG. 24B is a plan view of the key shown in FIG. 24A.
  • FIG. 25 is a longitudinal sectional view showing the magnetic tumbler lock to be used with the key shown in FIGS. 24A and 24B,
  • FIG. 26 is a cross sectional view taken in the plane A-B indicated in FIG. 25,
  • FIG. 27 is a cross sectional view taken in the plane C-D indicated in FIG. 25,
  • FIG. 28A is a plan view showing a key to be used with still further embodiment of the magnet tumbler lock of the present invention.
  • FIG. 28B is a plan view of the key shown in FIG. 28A.
  • FIG. 29 is a longitudinal sectional view showing the eighth embodiment of the magnet tumbler lock to be used with the key shown in FIGS. 28A and 28B, and
  • FIG. 30 is a cross sectional view taken in the plane perpendicular to that of FIG. 28.
  • a plurality of holes 5 are provided in series in outer cylinder 1 for movably receiving small pin-like permanent magnet pieces 5, respectively, inner cylinder 2 being rotatably fitted in cylindrical bore 3' in outer cylinder 1, a corresponding number of holes 5" being provided in the outer peripheral surface of inner cylinder 2 in alignment with said holes 5', respectively.
  • Said small pin-like permanent magnet pieces 5 are located in respective holes 5' so as to be moved in the axial direction of holes 5 so that magnet pieces 5 can be moved in said holes 5" when inner cylinder 2 is rotated to the locking position in bore 3' of outer cylinder 1.
  • bore 10' in which the key 10 is to be inserted has smooth inner surfaces, and therefore, the location of pins 5 cannot be sensed from either the outside of the lock or the inside of bore 10.
  • the line designated by the reference numeral 3 in FIG. 1 is usually called shear line.
  • magnet pieces 5 When magnet pieces 5 are in the positions shown in FIG. 1 wherein they extend in holes 5 and 5 across said shear line 3 when inner cylinder 2 is positioned in registry with outer cylinder in said bore 3, inner cylinder 2 is prevented from being rotated in said bore 3 by virtue of said magnet pieces 5 extending across said shear line 3. Therefore, in this position of inner cylinder 2, cylinder cam 7 fixedly secured to the end of inner cylinder 2 cannot be actuated thereby preventing the lock from being unlocked.
  • FIG. 2 shows the lock in locked position wherein magnet pieces 5 extend across shear line 3 thereby preventing inner cylinder 2 from being rotated in bore 3' of outer cylinder 1. Key 10 for use with the lock shown in FIG.
  • FIG. 5A six magnet pieces 6 of the key 10 are shown at positions A, B, C respectively.
  • the polarity of each of the magnet pieces 6 is selected, for example, to be l*-NS-NNS at its upper side from the left of the set of magnetic pieces 6.
  • magnet pieces 5 of the lock have their polarities selected to be N-N-N-N-S at their lower sides from the left of the set of magnetic pieces 5, respectively, then all of magnet pieces 5 are repelled to move upwardly from the positions shown in FIG. 1 to the positions shown in FIG. 3, thereby unlocking the lock.
  • bore in which the key is to be inserted has smooth inner surfaces, and shear line 3 cannot be sensed from the outside so as to detect the unlocking characteristics, and, further, it is difiicult to find out how many magnet pieces are provided in the lock and in which polarity they are located. Therefore, it is absolutely impossible to unlock the lock improperly by picking operation. It suffices to utilize gravitational force without providing any spring means in order to return magnet pieces 5 in the tumbler lock to their locking position. Therefore, this embodiment of the magnet tumbler lock can avoid any trouble which might be caused by using spring means feasible to be broken by fatigue as was the case in prior art cylinder locks.
  • the keys to be used with the cylinder locks are provided with surface irregularities for providing unlocking characteristics, therefore, the keys cannot be inserted in the locks smoothly.
  • the key of the present invention which has magnet pieces embedded therein, has smooth plain surfaces, thereby permitting the key to be inserted in the lock very smoothly. If plating is applied appropriately on the surface of the key, it makes it difficult to detect the magnet pieces in the key by visual inspection, therefore, the number of the magnet pieces and their polarity cannot easily be determined.
  • the present invention provides so-called magnetic pin-tumbler lock, magnetic disc-tumbler lock, or magnetic lever-tumbler lock by combining the construction of the magnet tumbler lock as described above with the construction of well known pin-tumbler lock, disctumbler lock, or lever-tumbler lock.
  • FIG. 6 illustrating the second embodiment of the present invention, for example, one edge of key 10 is provided with a plurality of notches 8 serving as the key of conventional pin-tumbler lock while key 10 is provided with magnet pieces 6 embedded therein.
  • Outer cylinder 1 and inner cylinder 2 are suitably provided with pin-tumblers, pins 9, drivers 11 and springs 12 are also built in adequately as in the case of conventional pin-tumbler lock.
  • one edge of key 10 is provided with a plurality of notches 8 serving as a key of conventional disc-tumbler lock, magnet pieces 6 are embedded in key 10, the construction of conventional disc-tumbler lock is provided appropriately in outer cylinder 1 and inner cylinder 2, and dsics 9' and springs 12' are built in the lock, then a magnetic disc-tumbler lock is provided in which the construction of magnet tumbler lock of the present invention is combined with conventional disc-tumbler lock, thereby enabling a large number of key changes to be obtained.
  • FIG. 9 shows the fourth embodiment of the combination of the construction of the magnet tumbler lock in accordance with the present invention with that of the conventional lever-tumbler lock.
  • key 10 of the conventional lever-tumbler lock is provided with recesses in rectangular form adapted to cooperate with conventional lever-tumbler lock.
  • Magnet pieces 6 are embedded in the head of key 10 parallel to the magnitudinal axis of the key as shown.
  • Magnet pieces 5 are also built in the lock movably in the direction parallel to the axis of the key so as to cooperate with magnet pieces 6 of the key when key 10 is inserted in the lock.
  • magnet pieces 5 When the key is inserted in the lock, magnet pieces 5 are repelled by magnetic force effected by magnet pieces 6, when the polarity of .both sets of magnet pieces 5 and 6 are properly oriented, thereby shifting magnet pieces 5 toward the left against the action of springs 12 so that magnet pieces 5 are moved out of shear line 3' permitting inner cylinder 2 to be rotated.
  • bit 8 of key 10 pushes the levertumbler thereby unlocking the lock in the same manner as the conventional lever-tumbler lock.
  • FIGS. 10 and 11 show the fifth embodiment of the present invention.
  • repulsiori permanent magnet pieces 114 are respectively secured at the ends of holes in outer cylinder 101 remote from the ends of holes 105" adjacent to which ends recesses 115 in inner cylinder 102 are located for removably receiving pins 105 in each of which a permanent magnet piece is built in. If the polarity of each of said magnet pieces 114 is oriented in such a manner, as shown in FIG. 10, that the upper side of each of magnet pieces 114 is N-N-S-N from the left of the set of magnet pieces 114, the polarity of each of magnet pieces 114 at the lower side thereof is S-S-N-S from the left of the set.
  • the key 110' inserted into the lock is not the proper one which, as shown in FIGS. 14, 15 and 16, for example, has permanent magnet pieces 106 embedded therein the polarity of each of which is NS1SS at the upper side thereof from the left of the set of magnet pieces 106, then the second and the fourth pins 105 are attracted by magnet pieces 106 to move downward .by the resultant magnetic force effected by magnet pieces 106 of key 110- and repulsion magnet pieces 114 in outer cylinder 101 thereby locating said pins 105 across shear line 103 sothat inner cylinder 102 cannot be rotated by key 110.
  • FIGS. 20A and 20B are enlarged detailed sectional views of a pin 105 with a permanent magnet piece 105' built therein.
  • the pin itself may be made of a permanent magnet piece, but, in general, a permanent magnet having intense magnetic force is made of sintered alloy and l the mechanical strength thereof is rather low and sometimes it is brittle, therefore, it is preferred to secure permanent magnet piece 105 within a tubular shell 105 made of metal or synthetic resin.
  • the lock comprises outer cylinder 101 and inner cylinder 102 rotatably fitted in said outer cylinder 101.
  • Inner cylinder is provided with a series of holes 105' in the outer surface thereof with each of their axes being vertical as shown and a slot into which key 110 is adapted to be inserted.
  • a plurality of pins 105 each comprising permanent magnet piece are movably provided in each of said holes 105.
  • Outer cylinder 101 is also provided with holes 105" in the inner surface thereof, the position of each of holes 105" corresponding to that of each of said holes 105' in inner cylinder 102 when inner cylinder 102 is in the locked position.
  • Pins 105 are normally held by the action of gravity in positions at which ins 105 extend both in holes 105' and 105" thereby preventing inner cylinder 102 to be rotated.
  • Key 110 specifically for use with the lock is provided with the same number of permanent magnet pieces embedded therein, the positions thereof corresponding to those of holes 105' in inner cylinder 102 when the key is properly inserted in the lock.
  • the orientation of the polarity of each of pins 105 is selected such that they are attracted by magnet piece 106 of key 110 when it is inserted to the lock thereby moving out from holes 105 in outer cylinder 101 so that inner cylinder 102 can be freely rotated to unlock the lock.
  • FIGS. 22 and 23 which illustrate the modification of the lock shown in FIG. 21, total of nine pins 105 each having therein a permanent magnet piece are provided in inner cylinder 102, and total of nine attraction permanent magnet pieces 114 are provided in outer cylinder 101 at locations corresponding to those of pins 105 as shown in FIG. 22.
  • pins 105 are attracted by said attraction magnet pieces 114' so that pins 105 are located in positions across shear line 103 thereby preventing inner cylinder 102 from being rotated.
  • Key 110 is provided with permanent magnet pieces 106 embedded therein, the number and location thereof corresponding to those of pins 105, said magnet pieces 106 having stronger magnetic forces than those of attraction permanent magnet pieces 114'.
  • FIGS. 24A, 24B, 25, 26 and 27 show further embodiment of the present invention.
  • a plurality of permanent magnet pieces 106 are embedded in one surface of key 110 made of non-magnetizable material such as brass or aluminium as shown in FIGS. 24A and 24B, with the arrangement and polarity of said magnet pieces 106 being suitably selected so as to provide various combinations of key changes.
  • the lock to be used with key 110 shown in FIGS. 24A and 24B is constructed as shown in FIG.
  • a plurality of permanent magnet pieces 106 can be located in the broad surface of key 110 at any desired distance from each other and in any orientation of polarity of magnet pieces 106.
  • the upper row of five magnet pieces 106 is arranged in such a manner that the polarity of each of magnet pieces 106 at the outer side is NNS-N-S from the left in the row, the polarity of each of five magnet pieces 106 in the intermediate roW being SSN-N-S at the outer side thereof from the left in the row, the polarity of each of five magnet pieces 106 in the lower row being NS-N-S-S at the outer side thereof from the left in the row.
  • 2 of key changes can be obtained by merely changing the orientation of the polarity of any of magnet pieces 106.
  • an almost infinite number of key changes can be obtained.
  • magnet pieces 114 may be replaced by repulsion magnet pieces 114 shown in FIG. 25 so that magnet pieces 114' normally repel pins 105 into locking position thereof.
  • FIGS. 28A and 28B which illustrate still further embodiment of the present invention show a key 110 in which a plurality of permanent magnet pieces 106 are embedded in the key stern of circular cross section at different positions lengthwise thereof each in radial direction of the cross section at different orientation.
  • the polarity of each of said magnet pieces 106 can be altered, and the orientation of magnet pieces 106 can be selected at any direction within the range of 360, and an extremely large number of key changes can be obtained by this embodiment.
  • the lock to be used with key 110 as shown in FIGS. 28A and 28B is shown in FIGS. 29 and 30.
  • Magnet pieces 105 are movably located in holes 105" in outer cylinder 101, respectively.
  • Repulsion magnet pieces 114 weaker than magnet pieces 106 of key 110 are provided at the outer end of each of holes 105" so as to normally repel magnet pieces 105 so that the latter are received in recesses 115 of inner cylinder 102 thereby locating magnet pieces 105 across shear line 103 so as to prevent inner cylinder 102 from being rotated.
  • Pin 117' can be retracted against the force of spring 119' during the rotation of inner cylinder 102 in unlocked state thereof by virtue of tapered end of pin 117.
  • Thin cylindrical tube 123 located on the peripheral surface of outer cylinder 101 serves to maintain magnet pieces 114 as well as spring 119' in position.
  • the key stem of key 110 is shown to have circular cross section; however, the cross section of the key stem can be made any regular or irregular polygonal form so as to fit the corresponding hole in the lock thereby dispensing with the provision of projection 125 and recess 126 for rotating inner cylinder 102 together with key 110.
  • a very useful and novel magnet tumbler lock is provided in accordance with the present invention by providing permanent magnet pieces in the lock and in the key with the polarity and location thereof selected appropriately.
  • spring means for moving pins into locking position as required in conventional pin-tumbler lock can be dispensed with, attractive force and/or repelling force acting between the pins in accordance with the present invention and the permanent magnet pieces provided in the lock providing means for moving the pins into locking position, while the repelling force and/or attracting force acting between the pins and the permanent magnet pieces provided in the key serves to move the pins out of locking positions thereof.
  • the lock of the present invention is very simple in construction and easy to manufacture, and is very stout and durable without any danger of fatigue failure, and provides an extremely large number of key changes. Further, the lock of the present invention absolutely cannot be unlocked without using the proper key designed to be used solely with the lock.
  • the lock includes the mechanism of conventional lock such as pin-tumbler lock, disc-tumbler lock and lever-tumbler lock in combination with the mechanism comprising said movable members adapted to cooperate with said permanent magnet pieces in the key, said key being also adapted to cooperate with said construction of the conventional lock so as to unlock the lock.
  • conventional lock such as pin-tumbler lock, disc-tumbler lock and lever-tumbler lock
  • said lock comprises an inner cylinder rotatably fitted in an outer cylinder of the lock and the key is formed in platelike shape, said permanent magnet pieces in the key being embedded in the broad surface of said key, the number, the arrangement and the orientation of the polarity of said permanent magnet pieces corresponding to those of said movable magnet members in the lock so as to move the latter to unlocking positions when the key is inserted in position in the lock, said movable magnet members in the lock being normally held to extend into recesses of an auxiliary cylinder shiftably located in said inner cylinder rotatably fitted in the outer cylinder of the lock by the magnetic forces acting between auxiliary permanent magnet pieces provided in the lock so as to maintain said magnet members in locking position, said magnet forces acting between said movable magnet members and said auxiliary permanent magnet pieces being overcome by the repulsion magnetic forces acting between said magnet members and said permanent magnet pieces in the key when the latter is inserted in position in the hole in said auxiliary cylinder so as to move said movable magnet members out of said recesses in
  • said permanent magnet pieces in the key are provided at positions lengthwise of the key stem of any polygonal cross section including circular section, said magnet pieces being located in the radial directions in each of their positions at various orientations in the plane perpendicular to the axis of said key stem, the number, the arrangement and the polarity of said magnet pieces corresponding to those of said movable magnet members so as to move the latter to unlocking positions when the key is inserted in the hole of the lock.
  • said permanent magnet members are located in the holes in the inner cylinder rotatably fitted in the outer cylinder of the lock and are normally attracted by the attracting magnetic force effected by attraction permanent magnet pieces provided in the outer cylinder of the lock to be partly received in recesses in the outer cylinder so as to maintain said magnet members in locking positions, respectively, at which said magnet members extend across the shear line defined by the inner surface of the outer cylinder and the outer surface of the inner cylinder, the orientation of the polarity of each of said permanent magnet pieces in said key being selected such that said attracting magnetic forces effected by said attraction permanent magnet pieces in the outer cylinder being overcome by the attraction magnetic force acting between said magnet members in the lock and said permanent magnet pieces in the key when the latter is inserted in the lock so that said magnet members are moved out of said shear line thereby enabling the lock to be unlocked.
  • said key includes at least one permanent magnet piece and said lock includes at least one movable member in the form of a permanent magnet piece adapted to cooperate with said magnet piece in said key to move by the magnetic force between the magnet lock and key pieces from a locking position where it extends across a shear line to an unlocking position wherein it clears said shear line as said key is inserted into said lock
  • said movable member is mechanically reinforced by a protective shell in which said magnet piece is fixedly held said shell being of stronger material than said magnet piece.

Landscapes

  • Lock And Its Accessories (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
US62709267 1966-08-26 1967-03-30 Magnetically actuated tumbler lock Expired - Lifetime US3393541A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5582266 1966-08-26

Publications (1)

Publication Number Publication Date
US3393541A true US3393541A (en) 1968-07-23

Family

ID=13009630

Family Applications (1)

Application Number Title Priority Date Filing Date
US62709267 Expired - Lifetime US3393541A (en) 1966-08-26 1967-03-30 Magnetically actuated tumbler lock

Country Status (8)

Country Link
US (1) US3393541A (fr)
AT (1) AT280839B (fr)
BE (1) BE697739A (fr)
DE (1) DE1678125B2 (fr)
ES (1) ES339572A1 (fr)
NL (1) NL6710995A (fr)
NO (1) NO129266B (fr)
SE (1) SE309174B (fr)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3512382A (en) * 1968-04-17 1970-05-19 Liquidonics Inc Hybrid lock
US3665740A (en) * 1969-06-30 1972-05-30 Goal Kk Magnetic pin tumbler lock
JPS5126876B1 (fr) * 1969-10-18 1976-08-09
JPS5237093U (fr) * 1975-09-03 1977-03-16
US4184277A (en) * 1976-07-23 1980-01-22 Emboss-O-Prestige LTEE Lockable name plate
US4333327A (en) * 1977-03-25 1982-06-08 Miwa Lock Co., Ltd. Magnetic tumbler lock
US4380162A (en) * 1975-01-08 1983-04-19 Woolfson Joseph W Magnetic lock
US4398404A (en) * 1980-03-10 1983-08-16 Miwa Rokku Kogyo Kabushiki Kaisha Key disengagement preventive device for magnetic tumbler cylinder locks
DE3424307A1 (de) * 1983-06-30 1985-01-03 Gebr. Grundmann GmbH, Herzogenburg, Niederösterreich Schluessel-schlosskombination auf zylinderschlossbasis
US4748834A (en) * 1978-02-18 1988-06-07 Lowe & Fletcher Limited Key made of magnetic material
AT388411B (de) * 1982-01-16 1989-06-26 Bks Sicherheitstechnik Gmbh Schluessel sowie dadurch zu betaetigender schliesszylinder
US5271253A (en) * 1992-03-16 1993-12-21 Mas-Hamilton Group Electronic combination lock with magnetic anti-attack interlock
US6041628A (en) * 1999-08-13 2000-03-28 Hua Ye Lin Magnetic key lock assembly
US6705139B2 (en) * 2001-06-15 2004-03-16 Lincoln Tsai Magnetic lock mechanism
EP1482108A3 (fr) * 2003-05-28 2005-12-21 Schlosssicherungen Gera GmbH Clef profilée plate protégée contre la copie pour serrures cylindriques
US20080202181A1 (en) * 2007-02-23 2008-08-28 Master Lock Company Llp Anti-tampering arrangements for pin tumbler cylinder locks
CN102304988A (zh) * 2011-05-30 2012-01-04 四川大学 一种磁性防盗锁及其钥匙
EP3101206A1 (fr) * 2015-06-03 2016-12-07 Assa Abloy Aube Anjou Serrure à sécurité magnétique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7703228A (nl) * 1977-03-25 1978-09-27 Kyoyasu Wake Slot met magnetisch grendelorgaan.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2576679A (en) * 1939-08-02 1951-11-27 Electro Chimie Metal Permanent magnet and method of manufacture thereof
US2719267A (en) * 1955-09-27 Magnet structure for electrical instruments
US2966789A (en) * 1958-12-19 1961-01-03 Hall Enrique Jorge Magnetic cylinder locks
US3111834A (en) * 1962-06-29 1963-11-26 Felson Ronald Magnetic locks

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2719267A (en) * 1955-09-27 Magnet structure for electrical instruments
US2576679A (en) * 1939-08-02 1951-11-27 Electro Chimie Metal Permanent magnet and method of manufacture thereof
US2966789A (en) * 1958-12-19 1961-01-03 Hall Enrique Jorge Magnetic cylinder locks
US3111834A (en) * 1962-06-29 1963-11-26 Felson Ronald Magnetic locks

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3512382A (en) * 1968-04-17 1970-05-19 Liquidonics Inc Hybrid lock
US3665740A (en) * 1969-06-30 1972-05-30 Goal Kk Magnetic pin tumbler lock
JPS5126876B1 (fr) * 1969-10-18 1976-08-09
US4380162A (en) * 1975-01-08 1983-04-19 Woolfson Joseph W Magnetic lock
JPS5237093U (fr) * 1975-09-03 1977-03-16
JPS5527806Y2 (fr) * 1975-09-03 1980-07-03
US4184277A (en) * 1976-07-23 1980-01-22 Emboss-O-Prestige LTEE Lockable name plate
US4333327A (en) * 1977-03-25 1982-06-08 Miwa Lock Co., Ltd. Magnetic tumbler lock
US4748834A (en) * 1978-02-18 1988-06-07 Lowe & Fletcher Limited Key made of magnetic material
US4398404A (en) * 1980-03-10 1983-08-16 Miwa Rokku Kogyo Kabushiki Kaisha Key disengagement preventive device for magnetic tumbler cylinder locks
AT388411B (de) * 1982-01-16 1989-06-26 Bks Sicherheitstechnik Gmbh Schluessel sowie dadurch zu betaetigender schliesszylinder
DE3424307A1 (de) * 1983-06-30 1985-01-03 Gebr. Grundmann GmbH, Herzogenburg, Niederösterreich Schluessel-schlosskombination auf zylinderschlossbasis
US5271253A (en) * 1992-03-16 1993-12-21 Mas-Hamilton Group Electronic combination lock with magnetic anti-attack interlock
US6041628A (en) * 1999-08-13 2000-03-28 Hua Ye Lin Magnetic key lock assembly
US6705139B2 (en) * 2001-06-15 2004-03-16 Lincoln Tsai Magnetic lock mechanism
EP1482108A3 (fr) * 2003-05-28 2005-12-21 Schlosssicherungen Gera GmbH Clef profilée plate protégée contre la copie pour serrures cylindriques
US20080202181A1 (en) * 2007-02-23 2008-08-28 Master Lock Company Llp Anti-tampering arrangements for pin tumbler cylinder locks
US8166783B2 (en) 2007-02-23 2012-05-01 Master Lock Company Llc Anti-tampering arrangements for pin tumbler cylinder locks
US8739588B2 (en) 2007-02-23 2014-06-03 Master Lock Company Llc Anti-tampering arrangements for pin tumbler cylinder locks
CN102304988A (zh) * 2011-05-30 2012-01-04 四川大学 一种磁性防盗锁及其钥匙
EP3101206A1 (fr) * 2015-06-03 2016-12-07 Assa Abloy Aube Anjou Serrure à sécurité magnétique
FR3037091A1 (fr) * 2015-06-03 2016-12-09 Assa Abloy Aube Anjou Serrure a securite magnetique

Also Published As

Publication number Publication date
DE1678125A1 (de) 1971-07-08
NO129266B (fr) 1974-03-18
NL6710995A (fr) 1968-02-27
BE697739A (fr) 1967-10-02
ES339572A1 (es) 1968-05-16
AT280839B (de) 1970-04-27
SE309174B (fr) 1969-03-10
DE1678125B2 (de) 1975-10-16

Similar Documents

Publication Publication Date Title
US3393541A (en) Magnetically actuated tumbler lock
US3518855A (en) Magnetically actuated tumbler lock
US3512382A (en) Hybrid lock
US2121301A (en) Magnetic lock and key
US4098103A (en) Cylinder lock
US4094175A (en) Internal tumbler lock key change system
US3665740A (en) Magnetic pin tumbler lock
JPS5921417B2 (ja) 錠の構造
US3877267A (en) Side bar lock and key mechanism
US3837195A (en) Magnetic pin lock
US4333327A (en) Magnetic tumbler lock
DE60309221T2 (de) Schliesszylinderanordnung
US3777520A (en) Lock assembly of the rotary cylinder type
US4325241A (en) System for the increase of the number of differing locking possibilities in rotary cylinder locks
US5138856A (en) Anti-pick lock
US2177996A (en) Lock
US3762193A (en) Pick-resistant lock
US3552159A (en) Magnetic key and lock
US3444711A (en) Magnetically operated mechanism and magnetic card
US3068682A (en) Padlock with dual blockers
US3729964A (en) Lock
US20100050715A1 (en) Magnetic coded lock mechanism
US3494157A (en) Magnetic lock
US3570287A (en) Magnetic lock with rotatable latching element
US3869889A (en) Tumbler mechanism for cylinder lock